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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/kernel.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/kernel.h')
-rw-r--r--include/linux/kernel.h307
1 files changed, 307 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
new file mode 100644
index 000000000000..7c1cba4a5278
--- /dev/null
+++ b/include/linux/kernel.h
@@ -0,0 +1,307 @@
1#ifndef _LINUX_KERNEL_H
2#define _LINUX_KERNEL_H
3
4/*
5 * 'kernel.h' contains some often-used function prototypes etc
6 */
7
8#ifdef __KERNEL__
9
10#include <stdarg.h>
11#include <linux/linkage.h>
12#include <linux/stddef.h>
13#include <linux/types.h>
14#include <linux/compiler.h>
15#include <linux/bitops.h>
16#include <asm/byteorder.h>
17#include <asm/bug.h>
18
19extern const char linux_banner[];
20
21#define INT_MAX ((int)(~0U>>1))
22#define INT_MIN (-INT_MAX - 1)
23#define UINT_MAX (~0U)
24#define LONG_MAX ((long)(~0UL>>1))
25#define LONG_MIN (-LONG_MAX - 1)
26#define ULONG_MAX (~0UL)
27
28#define STACK_MAGIC 0xdeadbeef
29
30#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
31#define ALIGN(x,a) (((x)+(a)-1)&~((a)-1))
32
33#define KERN_EMERG "<0>" /* system is unusable */
34#define KERN_ALERT "<1>" /* action must be taken immediately */
35#define KERN_CRIT "<2>" /* critical conditions */
36#define KERN_ERR "<3>" /* error conditions */
37#define KERN_WARNING "<4>" /* warning conditions */
38#define KERN_NOTICE "<5>" /* normal but significant condition */
39#define KERN_INFO "<6>" /* informational */
40#define KERN_DEBUG "<7>" /* debug-level messages */
41
42extern int console_printk[];
43
44#define console_loglevel (console_printk[0])
45#define default_message_loglevel (console_printk[1])
46#define minimum_console_loglevel (console_printk[2])
47#define default_console_loglevel (console_printk[3])
48
49struct completion;
50
51/**
52 * might_sleep - annotation for functions that can sleep
53 *
54 * this macro will print a stack trace if it is executed in an atomic
55 * context (spinlock, irq-handler, ...).
56 *
57 * This is a useful debugging help to be able to catch problems early and not
58 * be biten later when the calling function happens to sleep when it is not
59 * supposed to.
60 */
61#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
62#define might_sleep() __might_sleep(__FILE__, __LINE__)
63#define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0)
64void __might_sleep(char *file, int line);
65#else
66#define might_sleep() do {} while(0)
67#define might_sleep_if(cond) do {} while (0)
68#endif
69
70#define abs(x) ({ \
71 int __x = (x); \
72 (__x < 0) ? -__x : __x; \
73 })
74
75#define labs(x) ({ \
76 long __x = (x); \
77 (__x < 0) ? -__x : __x; \
78 })
79
80extern struct notifier_block *panic_notifier_list;
81extern long (*panic_blink)(long time);
82NORET_TYPE void panic(const char * fmt, ...)
83 __attribute__ ((NORET_AND format (printf, 1, 2)));
84fastcall NORET_TYPE void do_exit(long error_code)
85 ATTRIB_NORET;
86NORET_TYPE void complete_and_exit(struct completion *, long)
87 ATTRIB_NORET;
88extern unsigned long simple_strtoul(const char *,char **,unsigned int);
89extern long simple_strtol(const char *,char **,unsigned int);
90extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
91extern long long simple_strtoll(const char *,char **,unsigned int);
92extern int sprintf(char * buf, const char * fmt, ...)
93 __attribute__ ((format (printf, 2, 3)));
94extern int vsprintf(char *buf, const char *, va_list)
95 __attribute__ ((format (printf, 2, 0)));
96extern int snprintf(char * buf, size_t size, const char * fmt, ...)
97 __attribute__ ((format (printf, 3, 4)));
98extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
99 __attribute__ ((format (printf, 3, 0)));
100extern int scnprintf(char * buf, size_t size, const char * fmt, ...)
101 __attribute__ ((format (printf, 3, 4)));
102extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
103 __attribute__ ((format (printf, 3, 0)));
104
105extern int sscanf(const char *, const char *, ...)
106 __attribute__ ((format (scanf, 2, 3)));
107extern int vsscanf(const char *, const char *, va_list)
108 __attribute__ ((format (scanf, 2, 0)));
109
110extern int get_option(char **str, int *pint);
111extern char *get_options(const char *str, int nints, int *ints);
112extern unsigned long long memparse(char *ptr, char **retptr);
113
114extern int __kernel_text_address(unsigned long addr);
115extern int kernel_text_address(unsigned long addr);
116extern int session_of_pgrp(int pgrp);
117
118asmlinkage int vprintk(const char *fmt, va_list args)
119 __attribute__ ((format (printf, 1, 0)));
120asmlinkage int printk(const char * fmt, ...)
121 __attribute__ ((format (printf, 1, 2)));
122
123unsigned long int_sqrt(unsigned long);
124
125static inline int __attribute_pure__ long_log2(unsigned long x)
126{
127 int r = 0;
128 for (x >>= 1; x > 0; x >>= 1)
129 r++;
130 return r;
131}
132
133static inline unsigned long __attribute_const__ roundup_pow_of_two(unsigned long x)
134{
135 return (1UL << fls(x - 1));
136}
137
138extern int printk_ratelimit(void);
139extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
140
141static inline void console_silent(void)
142{
143 console_loglevel = 0;
144}
145
146static inline void console_verbose(void)
147{
148 if (console_loglevel)
149 console_loglevel = 15;
150}
151
152extern void bust_spinlocks(int yes);
153extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
154extern int panic_timeout;
155extern int panic_on_oops;
156extern int tainted;
157extern const char *print_tainted(void);
158extern void add_taint(unsigned);
159
160/* Values used for system_state */
161extern enum system_states {
162 SYSTEM_BOOTING,
163 SYSTEM_RUNNING,
164 SYSTEM_HALT,
165 SYSTEM_POWER_OFF,
166 SYSTEM_RESTART,
167} system_state;
168
169#define TAINT_PROPRIETARY_MODULE (1<<0)
170#define TAINT_FORCED_MODULE (1<<1)
171#define TAINT_UNSAFE_SMP (1<<2)
172#define TAINT_FORCED_RMMOD (1<<3)
173#define TAINT_MACHINE_CHECK (1<<4)
174#define TAINT_BAD_PAGE (1<<5)
175
176extern void dump_stack(void);
177
178#ifdef DEBUG
179#define pr_debug(fmt,arg...) \
180 printk(KERN_DEBUG fmt,##arg)
181#else
182#define pr_debug(fmt,arg...) \
183 do { } while (0)
184#endif
185
186#define pr_info(fmt,arg...) \
187 printk(KERN_INFO fmt,##arg)
188
189/*
190 * Display an IP address in readable format.
191 */
192
193#define NIPQUAD(addr) \
194 ((unsigned char *)&addr)[0], \
195 ((unsigned char *)&addr)[1], \
196 ((unsigned char *)&addr)[2], \
197 ((unsigned char *)&addr)[3]
198
199#define NIP6(addr) \
200 ntohs((addr).s6_addr16[0]), \
201 ntohs((addr).s6_addr16[1]), \
202 ntohs((addr).s6_addr16[2]), \
203 ntohs((addr).s6_addr16[3]), \
204 ntohs((addr).s6_addr16[4]), \
205 ntohs((addr).s6_addr16[5]), \
206 ntohs((addr).s6_addr16[6]), \
207 ntohs((addr).s6_addr16[7])
208
209#if defined(__LITTLE_ENDIAN)
210#define HIPQUAD(addr) \
211 ((unsigned char *)&addr)[3], \
212 ((unsigned char *)&addr)[2], \
213 ((unsigned char *)&addr)[1], \
214 ((unsigned char *)&addr)[0]
215#elif defined(__BIG_ENDIAN)
216#define HIPQUAD NIPQUAD
217#else
218#error "Please fix asm/byteorder.h"
219#endif /* __LITTLE_ENDIAN */
220
221/*
222 * min()/max() macros that also do
223 * strict type-checking.. See the
224 * "unnecessary" pointer comparison.
225 */
226#define min(x,y) ({ \
227 typeof(x) _x = (x); \
228 typeof(y) _y = (y); \
229 (void) (&_x == &_y); \
230 _x < _y ? _x : _y; })
231
232#define max(x,y) ({ \
233 typeof(x) _x = (x); \
234 typeof(y) _y = (y); \
235 (void) (&_x == &_y); \
236 _x > _y ? _x : _y; })
237
238/*
239 * ..and if you can't take the strict
240 * types, you can specify one yourself.
241 *
242 * Or not use min/max at all, of course.
243 */
244#define min_t(type,x,y) \
245 ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
246#define max_t(type,x,y) \
247 ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
248
249
250/**
251 * container_of - cast a member of a structure out to the containing structure
252 *
253 * @ptr: the pointer to the member.
254 * @type: the type of the container struct this is embedded in.
255 * @member: the name of the member within the struct.
256 *
257 */
258#define container_of(ptr, type, member) ({ \
259 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
260 (type *)( (char *)__mptr - offsetof(type,member) );})
261
262/*
263 * Check at compile time that something is of a particular type.
264 * Always evaluates to 1 so you may use it easily in comparisons.
265 */
266#define typecheck(type,x) \
267({ type __dummy; \
268 typeof(x) __dummy2; \
269 (void)(&__dummy == &__dummy2); \
270 1; \
271})
272
273#endif /* __KERNEL__ */
274
275#define SI_LOAD_SHIFT 16
276struct sysinfo {
277 long uptime; /* Seconds since boot */
278 unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
279 unsigned long totalram; /* Total usable main memory size */
280 unsigned long freeram; /* Available memory size */
281 unsigned long sharedram; /* Amount of shared memory */
282 unsigned long bufferram; /* Memory used by buffers */
283 unsigned long totalswap; /* Total swap space size */
284 unsigned long freeswap; /* swap space still available */
285 unsigned short procs; /* Number of current processes */
286 unsigned short pad; /* explicit padding for m68k */
287 unsigned long totalhigh; /* Total high memory size */
288 unsigned long freehigh; /* Available high memory size */
289 unsigned int mem_unit; /* Memory unit size in bytes */
290 char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
291};
292
293extern void BUILD_BUG(void);
294#define BUILD_BUG_ON(condition) do { if (condition) BUILD_BUG(); } while(0)
295
296#ifdef CONFIG_SYSCTL
297extern int randomize_va_space;
298#else
299#define randomize_va_space 1
300#endif
301
302/* Trap pasters of __FUNCTION__ at compile-time */
303#if __GNUC__ > 2 || __GNUC_MINOR__ >= 95
304#define __FUNCTION__ (__func__)
305#endif
306
307#endif